Book/Report

FZJ-2018-02339

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ein hochauflösendes System zur analogen Aufzeichnung und digitalen Verarbeitung von Meßwerten in der Fusionsforschung

Korten, M.FZJ* ; Lochter, M.FZJ* ; Lange, W. R.

1984
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/18033

Report No.: Juel-1909

Abstract: On the way of the development of a fusion power reactor, the research facility TEXTOR is a large scale physical experiment to investigate the parameters of a fusion plasma and the physical and technical aspects of plasma containment, especially in the field of plasma-wall interaction. Complexity and amount of physical and technical data to be recorded during TEXTOR operation require support of a powerful computer system for data aquisition, analysis, storage and display. Most of the physical quantities are recorded digitally and stored online on the computer's mass storage devices for further processing. In addition to the scientific objectives, monitoring and maintenance, interface problems and machine faults rise complex measurement problems for the manyfold technical components of the device. Here, a high temporal resolution of the order 100 kHz sampling rate is required over a period of 4 sec for several parallel signal channels, which would cause a large amount of data to be stored and processed using pure digital recording methods. However, it is in the nature of the problem that only small but previously unknown parts of the information are of relevance. An inexpensive way of combining a high resolution long range recording with moderate overhead for digital processing and storage was found by using a hybrid system of an analogue tape recorder combined with a computerized digital acquisition and processing system. In a first phase, the signals are recorded offline over the full range of TEXTOR discharges selecting the appropriate recording tapespeed. A tape search unit allows for flexible control of the tape recorder for precise access to the recorded data. In parallel, there is an online digital recording of the monitor signals, however, with considerably less time resolution. Upon evidence of, i. e. machine faults, the digital signals are used to preselect the relevant intervals to be retrieved for detailed processing. The output signals of the tape recorder are fed into the analog-to-digital converters of the data acquisition system, where they are processed and displayed with the requested resolution. This paper describes the system consisting of the erator, the tape search acquisition and computer experience obtained so far complete recording and processing tape recorder, the time code gencontrol unit and the digital data system. We describe the operational and display typical examples.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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